CESM-Development / cime

Common Infrastructure for Modeling the Earth
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Add BARRIER_OPTION/BARRIER_N to driver #366

Closed ekluzek closed 8 years ago

ekluzek commented 8 years ago

With some testing we found that adding a daily barrier for I compsets with a concurrent layout (at f09) gives good performance compared to other options (setting COMP_RUN_BARRIERS=TRUE, changing the PE layout, and using MPI options such as MP_EAGER_LIMIT). As such we would like to add new namelist options to the driver

BARRIER_OPTION BARRIER_N

which would turn on a barrier at the above given frequency in the same way that other _OPTION/_N options work. By default it would be off. For I compsets we'd turn it on for daily barriers. And perhaps we'd experiment with it and find the best performance for I compsets or other configurations.

ekluzek commented 8 years ago

Adding Tony as assignee for this, since he said he would take this on.

ekluzek commented 8 years ago

Tony implemented this into cime on2016-02-10